Starter System - Closed Throttle - Polaris Magnum 2x4 Service Manual

FUEL SYSTEM/CARBURETION
Starter System - Closed Throttle
Mikuni carburetors use a starter system rather than a choke. In this type of carburetor, fuel and air for starting
the engine are metered with entirely independent jets. The fuel metered in the starter jet is mixed with air and
is broken into tiny particles in the emulsion tube. The mixture then flows into the plunger area, mixes again with
air coming from the air intake port for starting and is delivered to the engine through the fuel discharge nozzle
in the optimum air/fuel ratio. The starter is opened and closed by means of the starter plunger. The starter type
carburetor is constructed to utilize the negative pressure of the inlet pipe, so it is important that the throttle valve
is closed when starting the engine.
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Cable Adjuster
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Plunger Spring
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Throttle Valve
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Inlet Bleed Air
Starter Jet
7/96 4.16
Polaris Industries Inc.